Hi Joao,for iemmatrix you need the dynamic libraries that come with it via deken, e.g. libgsl.0.dylib. So my suggestion is to download iemmatrix library via deken, use [declare] with -lib flag and open the patch being sure that the libraries are in the libs folder.best,-Marco MatteoPs. i am not a mailing list expert, but probably it is better to rename this thread iemmatrix dynamic libraries..